<!-- 首页中 banner区中的分类 -->
<template>
    <div class='home-category' @mouseleave="categoryId = null">
      <ul class="menu">
        <li :class="{active: categoryId === item.id}" v-for="item in menuList" :key="item.id" @mouseenter="categoryId = item.id">
            <!-- 一级分类 -->
          <RouterLink :to="`/category/${item.id}`" >{{ item.name }}</RouterLink>
          <template v-if="item.children">
            <!-- 二级分类 -->
            <RouterLink :to="`/category/sub/${sub.id}`" v-for="sub in item.children" :key="sub.id">{{sub.name}}</RouterLink>
          </template>

          <!-- 骨架屏 -->
          <template v-else>
            <XtxSkeleton width = '60px' height = "18px" bg="rgba(255, 255, 255, 0.2)" style="margin-right: 5px;"></XtxSkeleton>
            <XtxSkeleton height = "18px"  width = '40px' bg="rgba(255, 255, 255, 0.2)"></XtxSkeleton>
          </template>
        </li>
      </ul>
      <!-- 弹层 -->
    <div class="layer">
      <h4>{{currentCategory && currentCategory.id==='brand'?'品牌':'分类'}}推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <ul v-if="currentCategory && currentCategory.goods">
        <li v-for="item in currentCategory.goods" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="name ellipsis-2">{{item.name}}</p>
              <p class="desc ellipsis">{{ item.desc }}</p>
              <p class="price"><i>¥</i>{{item.price}}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <!-- 品牌 -->
      <ul v-if="currentCategory &&  currentCategory.brands">
        <li class="brand" v-for="brand in currentCategory.brands" :key="brand.id">
            <RouterLink to="/">
            <img :src="brand.picture" alt="">
            <div class="info">
                <p class="place"><i class="iconfont icon-dingwei"></i>{{brand.place}}</p>
                <p class="name ellipsis">{{brand.name}}</p>
                <p class="desc ellipsis-2">{{ brand.desc }}</p>
            </div>
            </RouterLink>
        </li>
    </ul>
    </div>
    </div>
  </template>
  
  <script>
import { reactive, computed, ref} from 'vue'
import { useStore } from 'vuex'
import {findBrand} from '@/api/home.js'
  export default {
    name: 'HomeCategory',
    setup () {
        const brand = reactive({
            id: 'brand',
            name: '品牌',
            children: [{id: 'brand-children', name: '品牌推荐'}],
            brands: []
        })
        console.log('1',brand);
        const store = useStore ()
        //用计算属性拿到响应式数据
        //得到九个分类 + 品牌
        const menuList = computed(() => {
           
            const list = store.state.category.list.map(item => {
                return {
                    id: item.id,
                    name: item.name,
                    children: item.children && item.children.slice(0, 2),
                    goods: item.goods
                }
            })
            list.push(brand)
            return list
        })

       

        //弹出层数据
        // 鼠标进入时的id
        const categoryId = ref(null)
        const currentCategory = computed(() => {
           return menuList.value.find(item => item.id ===  categoryId.value)
        })

        //获取品牌数据
        findBrand().then(data => {
             brand.brands = data.result
            
        })
        return {menuList, categoryId, currentCategory}
    }

  }
  </script>
  
  <style scoped lang='less'>
  .home-category {
  width: 250px;
  height: 500px;
  background: rgba(0,0,0,0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &:hover, &.active{
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255,255,255,0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        // 品牌样式
        li.brand {
        height: 180px;
        a {
          align-items: flex-start;
          img {
            width: 120px;
            height: 160px;
          }
          .info {
            p {
              margin-top: 8px;
            }
            .place {
              color: #999;
            }
          }
        }
      }

        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
              width: 95px;
              height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
		    width: 190px;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: @priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
    }
  }
  &:hover {
    .layer {
      display: block;
    }
  }
  
}
// 骨架效果
.xtx-skeleton {
  animation: fade 1s linear infinite alternate;
}
@keyframes fade {
  from {
    opacity: 0.2;
  }
  to {
    opacity: 1;
  }
}
</style>